A lot of us already have seen joining two metal pieces. If you are a person who works with the hardware of its electric products, you must have used soldering or even seen it. And there is a strong probability of seeing silver solder in your life. But the question is “How strong is silver solder?”
Silver solders’ have a common tensile strength of 40,000-70,000 psi ( pounds per square inch). For a lower melting point and higher fluidity, you need to add silver with a copper brazing alloy. You are maybe interested to know more about this. In this article, we will try to figure out these things. Let’s jump into it and stay till the end.
What is Soldering?
Soldering is a joining process to attach various types of metals permanently in a process of melting solder. Solder is a piece of metal which used for joining other metals. Usually, it is a fusible metal alloy to create a permanent bond between metals. The solder is used in metal workpieces, Jewelry, electrical joints, mechanical structure, and others like this. Three types of soldering are primarily noticeable. Those are-
- Soft Soldering
- Hard soldering or silver soldering
The melting point of the soft soldering process is the lowest metal melting point. The solder metal melts at a range of 90 to 450 °C (190 to 840 °F; 360 to 720 K). These solders are usually alloys that contain lead, that have a liquidus temperature under 350°C(662F;623K). The most commonly used alloys in this process are those which melt between 180 and 190 °C (360 and 370 °F; 450 and 460 K).
But it cannot build strong joints because of its least thermally stress components. Therefore this is not suitable for high load-bearing mechanical applications. This soldering is commonly used in electronics, plumbing, and sheet metal works.
Hard soldering or silver soldering
The silver soldering process has a melting point of alloys that are above 450 °C (840 °F; 720 K). As a solder alloys of copper with zinc or copper with silver are the most common.
This kind of solder is used in jewelry or the place of silversmiths. Especially this is used to join precious metals like gold, platinum, etc.
Brazing uses metal that contains a higher melting point than other solders used for hard and soft soldering. The metal bond is heated as the opposition melted. When the material is heated properly then you have to got to put the soldering metal into them to melt and act as a bonding medium.
How Strong Is Silver Solder
You will find silver alloy solder either lead-free or lead-based. But in recent years, silver was only added to the lead-based alloy solders. This has been done to prevent the effect known as silver migration.
The strong silver alloy solders have 60000 psi tensile strength. Even you will find 10000 psi strength of silver solders tensile in hardware shops.
The silver alloy solders have different ratios of silver, lead, and other alloys. The initial cost depends on the ratio of these alloys.
Now we know how strong is silver soldering. But for more clarification to its strength, we are going to compare silver soldering with other ways of joining metal.
Silver Soldering vs Soft Soldering
Silver soldering or hard soldering and soft soldering both use a metal piece as solder to join two pieces of metal or more than that. But the biggest difference between them is in the material of the solder, liquidus temperature, and the sustainability result.
Good silver solder is made of 65% fine silver, 20% copper, and 15% zinc. This combination of silver solder gives the joint a permanent strength of sustainability. The temperature range for this type of solder is above 450 °C (840 °F; 720 K).
In this process, solders usually consist of lead, iron, antimony, bismuth, brass, indium, tin. The temperature range for this type of solder is 90 to 450 °C (190 to 840 °F; 360 to 720 K).
Silver solders are stronger than regular solders which are always used to join mechanical parts. Because silver solder has a high melting point which gives it more strength than normal soldiers do. You cannot use it to join metals that have low melting points.
Though silver is one of the precious metals, people love this as a solder because of its sustainability and strength.
Silver Soldering vs Brazing
Silver soldering and brazing are pretty much the same. Even some American people consider silver soldering as silver brazing. But it is not the same. When peoples say pyramid and triangular the same thing then it will make sense for those who don’t know. Those who said silver soldering and brazing are the same are just like this.
Brazing solder is made of copper alloys. they also use nickel to made brazing solder. Some other metals used in this type of solder are phosphorous, silver, silicon, tin, or zinc.
In this case, the main difference is in the melting point. Both braze and silver solder can join base metal for permanent. But here the advantage of the silver solder is its initial time to meltdown and join the piece of metal.
Welding vs Silver Soldering
Welding is a high heat process that melts the base material. Typically with the additional filler material. The big difference between welding and Brazing or soldering is in the process. In brazing and soldering, they do not melt that base piece of metal. But in welding, it does melt the base metal.
When it comes to strength, you can guess that welding is a more sustainable way to join two pieces of metals by melting them. And the melting point depends on the types of materials like iron, stainless steel. So undoubtedly welding has better ability than soldering in the case of joint strength.
But silver soldering also has its own advantages. You can’t bear a welding machine with you easily. Even the operating system is tougher than soldering. There are many projects where you cant use welding.
If you have more questions related to this topic and I am going to answer those frequently asked questions now.
Is soldering a strong bond?
Soldering is a strong bond. But when you consider brazing or silver soldering then it is stronger than normal soldering. Even silver soldering or brazing is not stronger than welding.
What metal Cannot be soldered?
Though you will find a lot of metals that are good even excellent in solderability. But many metals are not good or not possible in solderability.
High alloy steel, Stainless steel, Cast iron, Chromium, Titanium, Tantalum, Magnesium cannot be soldered because some of them have too much chromium oxide or to solder, they require pre-plating or pre timing with extremely solderable metals.
What is silver solder used for?
Silver solder is used in jewelry or the place of silversmiths. Especially this is used to join precious metals like gold, platinum, etc.
What is the strongest type of solder?
The strongest type of soldiers contains a good amount of silver. this type of solder is known as silver solders. So we can say silver solder is the strongest type of solder.
Is silver solder stronger than regular solder?
Silver solder is much stronger than regular solder because of its
materials. You will find silver stronger from 10000 psi to 80000 psi. But it is tough to find silver solder with a tensile strength of more than 60000 psi.
Can silver solder be used on aluminum?
Nooo. You cannot use it on aluminum plates joining or over the aluminum surface. Because it won’t work onto these types of metal joining.
Can you use silver solder on copper?
Silver solders can be used on coppers easily without any difficulty. The amount of zinc in the alloy of silver solder lowers its melting points than copper. That’s why it is easy to use silver on copper.
At what temp does silver solder melt?
The melting point of silver solder is more than 450 °C (840 °F; 720 K). At this temperature, solder starts melting, and eventually, it joins the metals.
Do I need flux to solder?
Flux is not mandatory for solder. You can use solder without flux. Flux helps to break down the oxides on the metal which is not necessary for some metal to use silver brazing.
Rosin core solders do not require flux for their solder joint. Because in the manufacturing process they have been manufacture with the ability to break down the oxides on the metal.
What kind of flux do you use with silver solder?
Not only for silver solders for every kind of soldering or brazing flux should use every time if your solder is not a rosin core solder. What type of solder you will use for silver solder depends on the silver percentage of the solder.
If you are using silver solder with a percentage of 45% silver or more than that you have to use acid-based flux. But for a lower percentage of silver in silver solder doesn’t require acid-based flux.
So after all the facts, we can conclude that welding is the best way to join pieces of metals. But when it comes to solder joints silver solder is obviously one of those choices which appear in your mind first. Even if your mind now keeps asking you the question of how strong is silver solder then you have an answer to soothe your hunger of curiosity. You can say that silver solder is the best option among solders.
Hopefully, this article will give you the thing that you are looking for. Make new machinery and join them perfectly.